//
//  UIImage+JQFY.m
//  JQFY
//
//  Created by apple on 2017/8/6.
//  Copyright © 2017年 yannis. All rights reserved.
//

#import "UIImage+JQFY.h"

@implementation UIImage (JQFY)

-(UIImage *)scaleToWidth:(CGFloat)width{
    
    if (self.size.width<width) {
        return self;
    }
    
    CGFloat height = width/self.size.width*self.size.height;
    
    CGRect rect = CGRectMake(0, 0, width, height);
    
    UIGraphicsBeginImageContext(rect.size);
    
    [self drawInRect:rect];
    
    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
    
    UIGraphicsEndImageContext();
    
    return img;
    
}

//按比例缩放到指定区域
-(UIImage *)imageCompressForSize:(UIImage *)sourceImage targetSize:(CGSize)size{
    
    UIImage *newImage = nil;
    CGSize imageSize = sourceImage.size;
    CGFloat width = imageSize.width;
    CGFloat height = imageSize.height;
    CGFloat targetWidth = size.width;
    CGFloat targetHeight = size.height;
    CGFloat scaleFactor = 0.0;
    CGFloat scaledWidth = targetWidth;
    CGFloat scaledHeight = targetHeight;
    CGPoint thumbnailPoint = CGPointMake(0.0, 0.0);
    
    if(CGSizeEqualToSize(imageSize, size) == NO){
        
        CGFloat widthFactor = targetWidth / width;
        CGFloat heightFactor = targetHeight / height;
        
        if(widthFactor > heightFactor){
            scaleFactor = widthFactor;
            
        }else{
            
            scaleFactor = heightFactor;
        }
        scaledWidth = width * scaleFactor;
        scaledHeight = height * scaleFactor;
        
        if(widthFactor > heightFactor){
            
            thumbnailPoint.y = (targetHeight - scaledHeight) * 0.5;
        }else if(widthFactor < heightFactor){
            
            thumbnailPoint.x = (targetWidth - scaledWidth) * 0.5;
        }
    }
    
    UIGraphicsBeginImageContext(size);
    
    CGRect thumbnailRect = CGRectZero;
    thumbnailRect.origin = thumbnailPoint;
    thumbnailRect.size.width = scaledWidth;
    thumbnailRect.size.height = scaledHeight;
    
    [sourceImage drawInRect:thumbnailRect];
    
    newImage = UIGraphicsGetImageFromCurrentImageContext();
    if(newImage == nil){
        
        NSLog(@"scale image fail");
    }
    
    UIGraphicsEndImageContext();
    return newImage;
}


//指定宽度按比例缩放
-(UIImage *)imageCompressForWidth:(UIImage *)sourceImage targetWidth:(CGFloat)defineWidth{
    
    UIImage *newImage = nil;
    CGSize imageSize = sourceImage.size;
    CGFloat width = imageSize.width;
    CGFloat height = imageSize.height;
    CGFloat targetWidth = defineWidth;
    CGFloat targetHeight = height / (width / targetWidth);
    CGSize size = CGSizeMake(targetWidth, targetHeight);
    CGFloat scaleFactor = 0.0;
    CGFloat scaledWidth = targetWidth;
    CGFloat scaledHeight = targetHeight;
    CGPoint thumbnailPoint = CGPointMake(0.0, 0.0);
    
    if(CGSizeEqualToSize(imageSize, size) == NO){
        
        CGFloat widthFactor = targetWidth / width;
        CGFloat heightFactor = targetHeight / height;
        
        if(widthFactor > heightFactor){
            scaleFactor = widthFactor;
        }
        else{
            scaleFactor = heightFactor;
        }
        scaledWidth = width * scaleFactor;
        scaledHeight = height * scaleFactor;
        
        if(widthFactor > heightFactor){
            
            thumbnailPoint.y = (targetHeight - scaledHeight) * 0.5;
            
        }else if(widthFactor < heightFactor){
            
            thumbnailPoint.x = (targetWidth - scaledWidth) * 0.5;
        }
    }
    
    UIGraphicsBeginImageContext(size);
    
    CGRect thumbnailRect = CGRectZero;
    thumbnailRect.origin = thumbnailPoint;
    thumbnailRect.size.width = scaledWidth;
    thumbnailRect.size.height = scaledHeight;
    
    [sourceImage drawInRect:thumbnailRect];
    
    newImage = UIGraphicsGetImageFromCurrentImageContext();
    
    if(newImage == nil){
        
        NSLog(@"scale image fail");
    }
    UIGraphicsEndImageContext();
    return newImage;
}

//指定宽度按比例缩放
-(UIImage *)imageCompress:(UIImage *)sourceImage targetWidth:(CGFloat)defineWidth targetHeight:(CGFloat)defineHeight{
    
    UIImage *newImage = nil;
    CGSize imageSize = sourceImage.size;
    CGFloat width = imageSize.width;
    CGFloat height = imageSize.height;
    //    CGFloat targetWidth = defineWidth;
    //    CGFloat targetHeight = height / (width / targetWidth);
    CGSize size = CGSizeMake(defineWidth, defineHeight);
    CGFloat scaleFactor = 0.0;
    CGFloat scaledWidth = defineWidth;
    CGFloat scaledHeight = defineHeight;
    CGPoint thumbnailPoint = CGPointMake(0.0, 0.0);
    
    if(CGSizeEqualToSize(imageSize, size) == NO){
        
        CGFloat widthFactor = defineWidth / width;
        CGFloat heightFactor = defineHeight / height;
        
        if(widthFactor > heightFactor){
            scaleFactor = widthFactor;
        }
        else{
            scaleFactor = heightFactor;
        }
        scaledWidth = width * scaleFactor;
        scaledHeight = height * scaleFactor;
        
        if(widthFactor > heightFactor){
            
            thumbnailPoint.y = (defineHeight - scaledHeight) * 0.5;
            
        }else if(widthFactor < heightFactor){
            
            thumbnailPoint.x = (defineWidth - scaledWidth) * 0.5;
        }
    }
    
    UIGraphicsBeginImageContext(size);
    
    CGRect thumbnailRect = CGRectZero;
    thumbnailRect.origin = thumbnailPoint;
    thumbnailRect.size.width = scaledWidth;
    thumbnailRect.size.height = scaledHeight;
    
    [sourceImage drawInRect:thumbnailRect];
    
    newImage = UIGraphicsGetImageFromCurrentImageContext();
    
    if(newImage == nil){
        
        NSLog(@"scale image fail");
    }
    UIGraphicsEndImageContext();
    return newImage;
}

+(UIImage *)imgNamed:(NSString *)imgName{
    
    UIImage *img = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle]pathForResource:imgName ofType:nil]];
    
    return img;
}


- (void)clipImageWithSize:(CGSize)size andClipColor:(UIColor *)color complation:(void (^)(UIImage *))compltion andImage:(UIImage *)image
{
    dispatch_async(dispatch_queue_create(0, 0), ^{
        
        CGRect rect = CGRectMake(0, 0, size.width, size.height);
        UIGraphicsBeginImageContextWithOptions(size, YES, 0);
        //以下这两句代码是将圆形之外的颜色设置为指定颜色
        [color setFill];
        UIRectFill(rect);
        
        UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:rect];
        [path addClip];
        [image drawInRect:CGRectMake(0, 0, size.width, size.height)];
        UIImage *result = UIGraphicsGetImageFromCurrentImageContext();
        
        dispatch_async(dispatch_get_main_queue(), ^{
            
            if (compltion) {
                
                compltion(result);
            }
            
        });
        
        UIGraphicsEndImageContext();
    });
    
    
}

@end
